XA-H4 NXP Semiconductors, XA-H4 Datasheet - Page 31

• Manufacturer Part Number: XA-H4
• Description: The powerful 16-bit XA CPU core and rich feature set make the XA-H3 and XA-H4 devices ideal for high-performance real-time applications such as industrial control and networking
• Manufacturer: NXP Semiconductors

8. t
9. The MIN value for this parameter is guaranteed by design and is not tested in production to the specified limit. In those cases where a
Philips Semiconductors
TIMING DIAGRAMS
All references to numbered Notes are to the notes following the AC Electrical Characteristics tables
1999 Sep 24
Single-chip 16-bit microcontroller
memory controller to service DRAM. The number of CClks (system clocks) in t
equation in the AC tables. Regardless of what value is programmed into the control register, n will never be less than 2 clocks. Thus, at
30 Mhz system clock, the minimum value for RAS precharge is tRP=((2 * t
frequency F
maximum value is specified in the table for this parameter, it is tested.
RP
Note:
is specified as the minimum high time (thus inactive) on each of the 5 individual CS_RAS[5:1] pins when such pin is programmed in the
On Generic Data Reads, A0 can terminate a full clock period before A19–A1, and therefore
should not be used on some peripheral devices.
C
, is slowed down, t
BHE/BLE
D15–D0
A19–A1
ClkOut
OE
CS
A0
Figure 7. Generic (SRAM, ROM, Flash, I/O Devices, etc.) Read on 16-Bit Bus
C
(system clock period) of course becomes greater, and thus t
t
CHAV
Note 3
t
AVSL
t
CHSL
t
DIS
31
C
) – 16= ((2 * 33.33) – 16) = 50.6 ns. As the system clock
RP
is programmable, and is represented by n in the t
t
CHSH
t
t
AHDR
DIH
(Note 2)
RP
t
CHAH
becomes greater.
(Does Not Include A0)
Preliminary specification
XA-H4
SU01277
RP